As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
1) AT FL 330 "MAIN CARGO DOOR" LIGHT ILLUMINATED. DIFFERENTIAL WAS AT 8.4 PSI. COMPLETD EMERGENCY PROCEDURE. AT FL 300 AND 7.8 PSI DIFFERENTIAL THE LIGHT EXTINGUISHED.2) INSPECTED CARGO DOOR SYSTEM. NO MECHANICAL DEFECTS NOTED. ADJUSTED DOOR CLOSED MICROSWITCH IAW AEI MM, OPS CKS. GOOD.STATUS: CLOSED